html,body {
    background:url(../img/b1.png) repeat #f8f6e9;
    width: 100%;
    height: 100%;
}

@media screen and (max-width: 768px) {
    .mycenter{
        margin-top: 100px;
        margin-left: auto;
        margin-right: auto;
        height: 350px;
        width:100%;
        padding: 5%;
        padding-left: 5%;
        padding-right: 5%;
     }
    .mycenter mysign{
        width: 100%;
    }

    .mycenter input,checkbox,button{
        margin-top:2%;
         
    }
    .mycheckbox{
        margin-top:10px;
        
        margin-bottom: 10px;
        height: 10px;
    }
}



@media screen and (min-width: 768px) {
      .mycenter{
        margin-top: 100px;
        margin-left: auto;
        margin-right: auto;
        height: 350px;
        width:500px;
        padding: 5%;
        padding-left: 5%;
        padding-right: 5%;
    }
    .mycenter mysign{
        width: 440px;
    }

    .mycenter input,checkbox,button{
        margin-top:2%;
        margin-left: 10%;
        margin-right: 10%;
    }
    .mycheckbox{
        margin-top:10px;
        margin-left: 40px;
        margin-bottom: 10px;
        height: 10px;
    }

}

 

